Valve, Butterfly Valve, Wafer Butterfly Valve manufacturer / supplier in China, offering Pn16 Pn25 DN40-DN300 Fluoroplastic F4 Acid and Alkali Resistant Butterfly Valve, Pn16 Pn10 Double Flanged U Section Wafer Butterfly Valve, D341 Flange Resilient Seat Butterfly Valve with Gear Box and so on.